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Thread: Supersonic in a 777
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Old Feb 10, 2007 | 2:22 am
  #39  
chornedsnorkack
 
Join Date: Dec 2006
Posts: 1,452
Originally Posted by LarryJ
They are not. FL180 is the lowest flight level that can be assigned in the US. If FL180 is below 18,000' MSL due to low pressure then FL180 is not assignable.
And what happens if, due to high pressure, FL180 is above 18 000 feet?
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